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Ventilabrella eggeri


Classification: pf_mesozoic -> Heterohelicidae -> Ventilabrella -> Ventilabrella eggeri
Sister taxa: V. austinana, V. eggeri, V. ornatissima, V. sp.

Taxonomy

Citation: Ventilabrella eggeri Cushman 1928
Rank: Species
Basionym: Ventilabrella eggeri
Synonyms:
Taxonomic discussion: D. Georgescu added an ontogenetical series of Ventilabrella eggeri from the latest Santonian-earliest Campanian of the New Jersey coastal plain. [copied from Chronos database]

Type images:

Original description: Test rhomboid or fan-shaped in the adult, in the early stages biserial and in the very early stages of the microspheric form probably planispiral; chambers globular, in a single plane, early ones biserial, later ones added in series, alternating in position with the preceding ones; sutures distinct, depressed; wall calcareous, perforate, ornamented with broken, longitudinal ridges; aperture in the biserial stage in the inner margin, in the adult two openings, one on either side of the chamber near the base.

Entries in the Catalog of original descriptions: Ventilabrella eggeri, Ventilabrella eggeri glabrata, Planoglobulina transcaucasica

Geological Range:
Last occurrence (top): within G. ventricosa zone (76.18-79.20Ma, top in Campanian stage). Data source: [copied from Chronos database]
First occurrence (base): within D. asymetrica zone (84.19-86.71Ma, base in Coniacian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

Character matrix

test outline:Subtriangularchamber arrangement:Multiserialedge view:Compressedaperture:Multiple
sp chamber shape:Inflatedcoiling axis:N/Aperiphery:N/Aaperture border:Thin flange
umb chbr shape:Inflatedumbilicus:N/Aperiph margin shape:Moderately roundedaccessory apertures:N/A
spiral sutures:Moderately depressedumb depth:N/Awall texture:Finely costateshell porosity:-
umbilical or test sutures:Moderately depressedfinal-whorl chambers:3.0-8.0 N.B. These characters are used for advanced search. N/A - not applicable

References:

Cushman, J. A. (1928c). Foraminiferes du Stampien du Bassin de Paris. Bulletin de la Société des Sciences de Seine-et-Oise. 9: 47-63. gs

Honigstein, A., Almogi-Labin, A. & Rosenfeld, A. (1987). Combined ostracod and planktonic foraminiferal biozonation of the Late Coniacian - Early Maastrichtian in Israel. Journal of Micropalaeontology. 6(2): 41-60. gs V O

Pessagno, E. A. (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Palaeontographica Americana. 5: 245-445. gs V O


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Ventilabrella eggeri compiled by the pforams@mikrotax project team viewed: 22-10-2020

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110568 Go to Archive.is to create a permanent copy of this page - citation notes



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